Telephone set



FIG. 1 is a front, top and left side perspective view of telephone set showing my new design;

FIG. 2 is a rear elevational view of FIG. 1; and

FIG. 3 is a bottom plan view of FIG. 1.

The undisclosed right side of the telephone set showing my new design forms no part of the claimed design. 

The ornamental design for a telephone set, as shown and described. 